QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

4 km WSW of Las Marías, Puerto Rico

· 25 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 6 kmAñasco Municipio 12 kmMaricao Municipio 12 kmSan Sebastián Municipio 13 kmSan Germán Municipio 14 kmHormigueros Municipio 14 kmMoca Municipio 17 kmLares Municipio 18 kmSabana Grande Municipio 19 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.5 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 6 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2706 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 18.2311, -67.0331. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 6 km (4 mi) W of here earthquakes near Las Marías Municipio
Añasco Municipio, PR 12 km (8 mi) ESE of here earthquakes near Añasco Municipio
Maricao Municipio, PR 12 km (8 mi) WNW of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 13 km (8 mi) SSW of here earthquakes near San Sebastián Municipio
San Germán Municipio, PR 14 km (9 mi) N of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 14 km (9 mi) NE of here earthquakes near Hormigueros Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

51 earthquakes have been recorded within 50 km since this one.

  1. 1.7 10 km N of Hatillo, Puerto Rico
  2. 2.3 2 km NE of Rincón, Puerto Rico
  3. 2.1 6 km SE of Maricao, Puerto Rico
  4. 2.8 20 km SW of Stella, Puerto Rico
  5. 1.9 3 km ENE of Magas Arriba, Puerto Rico
  6. 1.5 10 km N of Yauco, Puerto Rico
  7. 2.3 19 km NW of San Antonio, Puerto Rico
  8. 2.4 23 km NW of Rincón, Puerto Rico
  9. 1.8 18 km SSW of Guánica, Puerto Rico
  10. 2.1 1 km NW of Maricao, Puerto Rico
  11. 1.5 Puerto Rico region
  12. 2.2 9 km WSW of Mayagüez, Puerto Rico
  13. 2.1 19 km WSW of Stella, Puerto Rico
  14. 2.4 18 km WNW of Puerto Real, Puerto Rico
  15. 3.3 Mona Passage

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-10-14 — it released about 16,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.